| Microsoft DirectX 9.0 |
The IDecimateVideoImage interface specifies decimation on a decoder filter. The term decimation refers to scaling the video output down to a size smaller than the native size of the video.
Applications must not call methods on this interface. The Overlay Mixer filter uses this interface to decimate video at the video decoder.
Decoder filters that can decimate their video output should support this interface.
In addition to the methods inherited from IUnknown, the IDecimateVideoImage interface exposes the following methods.
| Method | Description |
| ResetDecimationImageSize | Specifies that the decoder should no longer decimate its output image. |
| SetDecimationImageSize | Specifies the dimensions to which the decoder should decimate its output image. |